Renewable                   Energy                   Wali Memon1   Wali Memon
Estimates of depletable energy resources in the U.S.Numbers = how long it would last if all energy came from one sourceRes...
Estimates of renewable energyNumbers = proportion of current U.S. energy needs that could be supplied foran indefinite per...
GeothermalHeat near surface ofthe earth = geysers,volcanoes, hotsprings    4    Wali Memon
Use heat to make steam to turnturbine for electrical generationNote: deep hot waters arecorrosive to best to inject cleanw...
In U.S., much done onpublic land = cheapVery little potential in eastand mid west    6      Wali Memon
World wide distribution of                              Japan, Iceland,New Zealandvolcanos, hot springs, etc.   7    Wali ...
8   Wali Memon
Although hot areas near surface are limited, the earth is hoteverywhere if you go down far enough.9    Wali Memon
Bright idea!? – drill deep enough to find heat. Since rock is a poor conductor ofheat, set off a big bomb to crack the roc...
11   Wali Memon
Hydropower = damsNot much used in world,why??12    Wali Memon
Norway,                  Zambia,                  Ghana big13   Wali Memon                  users
14   Wali Memon
Most unused hydropower in U.S. = Alaska,     In World = Canada, Russia15      Wali Memon
Problems with hydroelectric        Location = unused rivers are in extreme north or low population        areas        Com...
Tidal Power1. In areas of large tides2. Anywhere – build   offshore dam 17     Wali Memon
Highest tides in the     world = Bay of Fundy     16 meters = 48+ feet!18      Wali Memon
Tidal power anywhere1. No dam – but a turbine.Problems:1. Corrosion2. Navigation3. Appearance4. Amount of energy available...
Wind Power =wijnd farmsBanning Pass  20    Wali Memon
Best wind location = Aleutian Islands,why no wind development there?21   Wali Memon
Best U.S. localitiesMidwest, mountainsAnd coastal areas.    22    Wali Memon
23   Wali Memon
Netherlands =coastaldevelopment 24    Wali Memon
England = off shore25   Wali Memon
26   Wali Memon
Wind energy problems       Location – near population center       Bird migration –       Visual       Must be coupled wit...
Solar farm = bigsolar plants28    Wali Memon
29   Wali Memon
30   Wali Memon
At focal point = heat liquid – steam to turn turbine31     Wali Memon
32   Wali Memon
33   Wali Memon
‘hard’ vs ‘soft’ energy paths Hard =                      Soft = 1. Big plants               1. Decentralized 2. Centraliz...
Energy efficient house; windpower on roof. Solar panelsfor heat and electricity.   35    Wali Memon
Solar electricity generation36   Wali Memon
Solar water heating   solar air heating37   Wali Memon
Solar house problems       The Los Angeles air = smog       Retrofitting- very expensive       Hard for big hotels, Walmar...
Solar house economics    Add $16,000 to price of house    Pay back - $1500 per year in energy costs    15 years to break e...
40   Wali Memon
Electrical generationSwitch from petroleum to coaland natural gasWhy has hydroelectricdeclined?When did nuclear go up?   4...
Note: drop in fusion, fission – why?      drop in renewables, increase in fossil fuels.42    Wali Memon
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Transcript of "Renewable Energy"

  1. 1. Renewable Energy Wali Memon1 Wali Memon
  2. 2. Estimates of depletable energy resources in the U.S.Numbers = how long it would last if all energy came from one sourceResource recoverable recoverable and hoped forCoal 125 1300Petroleum 5 50?Natural gas 5 50?Oil shale 0 2500Conventional reactors 3 15Breeder reactors 115 750Fusion 106 to 109Geothermal surface 0.2 60 2 Wali Memon deep rock 0 600
  3. 3. Estimates of renewable energyNumbers = proportion of current U.S. energy needs that could be supplied foran indefinite period.Tidal energy 0.1Organic Waste 0.1Photosynthesis 0.23Hydropower 0.14Wind Power 5Solar radiation 740 3 Wali Memon
  4. 4. GeothermalHeat near surface ofthe earth = geysers,volcanoes, hotsprings 4 Wali Memon
  5. 5. Use heat to make steam to turnturbine for electrical generationNote: deep hot waters arecorrosive to best to inject cleanwater in a closed system and bringit back to the surface as steam. 5 Wali Memon
  6. 6. In U.S., much done onpublic land = cheapVery little potential in eastand mid west 6 Wali Memon
  7. 7. World wide distribution of Japan, Iceland,New Zealandvolcanos, hot springs, etc. 7 Wali Memon big users of geothermal.
  8. 8. 8 Wali Memon
  9. 9. Although hot areas near surface are limited, the earth is hoteverywhere if you go down far enough.9 Wali Memon
  10. 10. Bright idea!? – drill deep enough to find heat. Since rock is a poor conductor ofheat, set off a big bomb to crack the rock and allow heat to move – then pump 10down water to make steam. Wali Memon
  11. 11. 11 Wali Memon
  12. 12. Hydropower = damsNot much used in world,why??12 Wali Memon
  13. 13. Norway, Zambia, Ghana big13 Wali Memon users
  14. 14. 14 Wali Memon
  15. 15. Most unused hydropower in U.S. = Alaska, In World = Canada, Russia15 Wali Memon
  16. 16. Problems with hydroelectric Location = unused rivers are in extreme north or low population areas Competition with recreational uses (U.S.) and environmental concerns Hard to build dams in populated river valleys Siltation of dams – limited life.16 Wali Memon
  17. 17. Tidal Power1. In areas of large tides2. Anywhere – build offshore dam 17 Wali Memon
  18. 18. Highest tides in the world = Bay of Fundy 16 meters = 48+ feet!18 Wali Memon
  19. 19. Tidal power anywhere1. No dam – but a turbine.Problems:1. Corrosion2. Navigation3. Appearance4. Amount of energy available is low5. Best tides are near poles – away from people. 19 Wali Memon
  20. 20. Wind Power =wijnd farmsBanning Pass 20 Wali Memon
  21. 21. Best wind location = Aleutian Islands,why no wind development there?21 Wali Memon
  22. 22. Best U.S. localitiesMidwest, mountainsAnd coastal areas. 22 Wali Memon
  23. 23. 23 Wali Memon
  24. 24. Netherlands =coastaldevelopment 24 Wali Memon
  25. 25. England = off shore25 Wali Memon
  26. 26. 26 Wali Memon
  27. 27. Wind energy problems Location – near population center Bird migration – Visual Must be coupled with other sources of electricity. (intermittent supply)27 Wali Memon
  28. 28. Solar farm = bigsolar plants28 Wali Memon
  29. 29. 29 Wali Memon
  30. 30. 30 Wali Memon
  31. 31. At focal point = heat liquid – steam to turn turbine31 Wali Memon
  32. 32. 32 Wali Memon
  33. 33. 33 Wali Memon
  34. 34. ‘hard’ vs ‘soft’ energy paths Hard = Soft = 1. Big plants 1. Decentralized 2. Centralized production 2. units per household 34 Wali Memon
  35. 35. Energy efficient house; windpower on roof. Solar panelsfor heat and electricity. 35 Wali Memon
  36. 36. Solar electricity generation36 Wali Memon
  37. 37. Solar water heating solar air heating37 Wali Memon
  38. 38. Solar house problems The Los Angeles air = smog Retrofitting- very expensive Hard for big hotels, Walmarts, etc.38 Wali Memon
  39. 39. Solar house economics Add $16,000 to price of house Pay back - $1500 per year in energy costs 15 years to break evenFederal tax incentive; 40% of investment can be written off. Discontinued in1986City of Claremont – solar energy ordinance. 60% of hot water – solarExceptions for equivalent savings of energy = Colleges approach. Why nottrust solar? 39 Wali Memon
  40. 40. 40 Wali Memon
  41. 41. Electrical generationSwitch from petroleum to coaland natural gasWhy has hydroelectricdeclined?When did nuclear go up? 41 Wali Memon
  42. 42. Note: drop in fusion, fission – why? drop in renewables, increase in fossil fuels.42 Wali Memon

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